1// SPDX-License-Identifier: GPL-2.0-or-later
2 /* I2C access for DA9055 PMICs.
3 *
4 * Copyright(c) 2012 Dialog Semiconductor Ltd.
5 *
6 * Author: David Dajun Chen <dchen@diasemi.com>
7 */
8
9#include <linux/module.h>
10#include <linux/device.h>
11#include <linux/i2c.h>
12#include <linux/err.h>
13#include <linux/of.h>
14#include <linux/of_device.h>
15
16#include <linux/mfd/da9055/core.h>
17
18static int da9055_i2c_probe(struct i2c_client *i2c,
19				      const struct i2c_device_id *id)
20{
21	struct da9055 *da9055;
22	int ret;
23
24	da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
25	if (!da9055)
26		return -ENOMEM;
27
28	da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
29	if (IS_ERR(da9055->regmap)) {
30		ret = PTR_ERR(da9055->regmap);
31		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
32			ret);
33		return ret;
34	}
35
36	da9055->dev = &i2c->dev;
37	da9055->chip_irq = i2c->irq;
38
39	i2c_set_clientdata(i2c, da9055);
40
41	return da9055_device_init(da9055);
42}
43
44static int da9055_i2c_remove(struct i2c_client *i2c)
45{
46	struct da9055 *da9055 = i2c_get_clientdata(i2c);
47
48	da9055_device_exit(da9055);
49
50	return 0;
51}
52
53/*
54 * DO NOT change the device Ids. The naming is intentionally specific as both
55 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
56 * devices (both have configurable I2C addresses, and are to all intents and
57 * purposes separate). As a result there are specific DA9055 ids for PMIC
58 * and CODEC, which must be different to operate together.
59 */
60static const struct i2c_device_id da9055_i2c_id[] = {
61	{"da9055-pmic", 0},
62	{ }
63};
64MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
65
66static const struct of_device_id da9055_of_match[] = {
67	{ .compatible = "dlg,da9055-pmic", },
68	{ }
69};
70
71static struct i2c_driver da9055_i2c_driver = {
72	.probe = da9055_i2c_probe,
73	.remove = da9055_i2c_remove,
74	.id_table = da9055_i2c_id,
75	.driver = {
76		.name = "da9055-pmic",
77		.of_match_table = of_match_ptr(da9055_of_match),
78	},
79};
80
81static int __init da9055_i2c_init(void)
82{
83	int ret;
84
85	ret = i2c_add_driver(&da9055_i2c_driver);
86	if (ret != 0) {
87		pr_err("DA9055 I2C registration failed %d\n", ret);
88		return ret;
89	}
90
91	return 0;
92}
93subsys_initcall(da9055_i2c_init);
94
95static void __exit da9055_i2c_exit(void)
96{
97	i2c_del_driver(&da9055_i2c_driver);
98}
99module_exit(da9055_i2c_exit);
100
101MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
102MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
103MODULE_LICENSE("GPL");
104